DESCRIPTIONS OF CARIBBEAN MIOCENE FOSSILS. 339 



LUNATIA, Gray. 

 L. EMiNULOiDEs, Gabb, n. s., PI. 44, fig. 4. 



Shell small, elongated subglobular, somewhat higher than wide ; apex elevated, 

 whorls five, rounded, not prominent ; suture small but sharp ; surface marked by 

 fine lines of growth; mouth long vertically; inner lip not very heavily thickened; 

 umbilicus small, but well defined. 



Figure. Twice natural size. 



Locality. With the preceding, found also by Mr. Miller. Allied to L. emimila, 

 Conrad, from the Eocene of Claiborne, Ala., but with a proportionately much 

 smaller spire. That species has one volution more than this in a shell of the same 

 size. _ 



L. scuLPTURATA, Gabb, n. s., PI. 44, fig. 5. 



Shell small, elongated, slightly oblique, whorls increasing rapidly in size, so 

 that the upper are nearly hidden by the body whorl ; surface more convex below 

 than above; suture well marked by a very narrow flattening of the tops of the 

 succeeding volution; surface evenly sculptured by about thirty regular, small, 

 equidistant impressed lines. Inner lip well thickened where in contact with the 

 body whorl; gradually diminishing in advance. Umbilicus well marked. 



Figure. Slightly magnified. 



Locality. Sapote, Costa Rica ; also found by Mr. Miller. 



SIGARETUS, Lam. 

 S. MULTiLiNEATTJS, Gabb, D. s., PI. 44, fig. 6. 



Shell small, very oblique ; body whorl increasing very rapidly in size ; spire 

 small, convex, whorls few, apparently not more than four, perhaps four and a half. 

 In one specimen the apex is broken, and in the only other two that I have, the 

 manner of the fossilization makes the count at the extreme apex uncertain. Sur- 

 face ornamented by very numerous, small revolving ribs, showing something of a 

 tendency to alternation in size on the side of the body whorl. Aperture oblique, 

 large; thickening of umbilical margin well marked, terminating externally in a 

 sharp edge, and sloping into^ the mouth. 



Figure. About twice linear size. 



Found with all the other new Naticoids of this paper at Sapote, Costa Eica, by 

 Mr. S. Miller. 



Most nearly allied to S. declivis, Conrad, of the Eocene of Claiborne, but the 

 ribs of this species are smaller and more closely placed, and the umbilical margin 

 is broader and flatter. 



